Pump



G. F. BALLAY Apn'ifi 1 192%,

PUMP

Filed Dec. 27. 1921 2 Sheets-Sheet 1 INVENTOR George FBaZZay WITNESSATTORNEY Aprii l 1924'. 1,48%,729

G. F. BALLAY PUMP F1? 1 26 Dev. 27 1921 2 Sheets-Sheet 2 v FIG. 5.

FIG. 7. FIG. 8. FIG. 9.

INVENTOi? WITNESS 607fqe EBaZlay.

ATTORNEY Patented Apia l, @22 1,

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@hOiRGl-lll FF. EMMY, @1 5 Ml teen, (GELLIFQENEA.

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Application filed hecemher 53 To all whom it may concern:

Be it known that l, Gnoncn F. BALLAY, a citizen of the United States,and resident of San dose, in the county of Santa 5 Clara and State ofCalifornia," have invented a certain new and useful Improvement inPumps, of which thefollowing is a specification.

This invention relates to that class of W machines operable as a-pumpwhen power is applied to operate the parts for the transportation offluid.

The invention more especially relates to that type of machine known asrota pumps, in which there is a casing or shel usually having asubstantially cylindrical chamber in which there is operative a drivingrotor carrying radial blades having a defined orbital movement with aresultant fi l reci rocation of the blades or pistons in the gui es orguide-forming portions provided on or formed in the rotor.

In the usual type of such rotary pump,

one edge of the blades either has frictional contact on the innercylindrical surface of the casing chamber, or the opposite edge travelsin a track or follows along the surface of a cam, causing tremendousfriction,

producing rapid wear, taking excessive power, and ultimately resultingin the freezing up or stopping of the entire machine.

In that type of rotary pump, the blades project as they approach a givenposition materially beyond the periphery of the rotor, with the resultthat the resistance of the fluid onthe exposed portions of the bladestends to rock and cant the blades and cause them to bind across theedges to of their guide ways with undue friction.

It is one of the ob'ects of the resent invention to improve t econstruction of machines operative as a'rotary pump, so that thementioned friction with its resulting wear is practically eliminated.

In other words, it is an object of the invention to provide, a simple,inexpensive, and practicable device attached to or formed on the rotorfor carrying the blades to as they pass the inner cylindrical surface ofthe casing chamber where the liquid passes through the pump, improvedmeans being provided for the ed'ective hearin or supporting of theblades throughout t eir width dimension at any position of the esblades; thus enabling them to run freely with respect to the rotor; alsorelieving them of all frictional contact against the peripheral surfaceof the casin chamber,

and therefore, materially re ucing the to wear.

lltis also an object of the invention to provide for connecting thepressure behind each end of the rotating side walls together and,therefore, equalizing all end thrusts as against the rotor.

it is a further object ot the invention to provide means for definingthe orbital movement of the blades, allowing the blades to be radiallydisposed in the rotor, and to carried by the rotor as they pass theinner cylindrical surface of the casing chamber between the V suctionand the discharge where the liquid travels through the pump.

The invention possesses other objects is and features of advantage someof which, with the foregoingwill be made manifest in the followingdescription of the referred form of the invention which is i lustratedin the drawings accompanying Md ee forming part of the specification.

It is to be understood that it is not in tended to limit the inventionto the embodiment' shown by said drawings and descrip tions, asvariations may be adapted within es Figure l is a side elevation or theflanged m rotor, showing theseries of improved guideways in the sidewalls.

piston blades.

Figure .8 is a central longitudinal sectional view of one of the istonblades.

Figure 9 is a si e elevation of one of the piston blades,

The principal improvements consist, first, in providing a device for arotor of a rotary pump with a series of improved effective extendedhearings or guides onto which the blades run as they are projectedbeyond thebody of the rotor in which they are telescopically operated,means being rovided on the device to carry the blades ii'om the suctionto the discharge and prevent them from having frictional contact on theperipheral surface of the casing chamber where the liquid travelsthrough the ump; provision being made for equalizing t e end pressuresagainst the rotor, andsecondly a feature of the invention is theprovision providing for the defining of the orbital movement of theblades.

The improvements may be embodied in any type of rotarypump in whichthere is a shell or casing 2, which obviously, may be built up in anysuitable manner, the present illustration not being utilized asindicating the only form of casing in which the parts may be mounted.

The shell preferably forms a substantial c lindrical c amber 3 of anydiameter and t rough which there extends an ecc/entrically mounteddriving shaft 4, on whichis secured what is commonly called the rotor 5,having a diameter considerably less than the diameter of the chamber 3in which it operates and is ecoentrically located with one side of therotor running quite close to the contiguous cylindrical inner wall ofshell 7 2. In the present case the rotor approaches the top of theshells inner surface, and therefore leaves a material space between thebot-tom of the rotor and the bottom inner surface of chamber 3. One sideof the shell is provided with an inlet connection 6, and the oppositeside is provided with an outlet connection 7 the inlet and outletconnections in this case extending laterally from the peripheral wallsof shell 2.

' The rotor 5 is provided with a plurality of substantially radialguide-forming recesses or pockets 8 extending from end to end in therotor and through the side walls 15. In each of the ideways 8. and 8respectively, there is s idably mounted a flat blade 9, hereinaftertermed the piston blade, and which when it is retracted, ap

. preaches the bottom of its respective guideway 8 as shown in the upperpartof the romesses tor 5, Figure 2, and as the rotor rotates, theblades 9 relatively move outwardly to the maximum position shown by thelowermost piston blades 9 in Figure 2, and in which position, the bladesare in their maximum drlving position, forming a movable wall extendingbetween the lower position of the rotor 5 and the opposite spaced bottomsurface of the chamber 3.

As above stated, it is desirable to prevent the piston blades fromhaving frictional contact on the inner cylindrical surface of chamber 3and at the same time to prevent their binding on the transverseshoulders formed by the outer ends of the guide-ways .8 in the rotor 5,and this is readily accomchamber end walls, the flanges extendingpreferably to and beyond the outermost po- 7 sition of the outer edgesof the piston blades 9, and are slotted or provided with 'des coincidentwith the guide-ways 8 of t e rotor as is shown by the extendedguide-edges 8, Figure 3, and onto which edges the piston blades runintheir outermost positions.

The guides are preferably out through the flanges to allow t e pistonblades to fit into a means beyond the ends of the flanges for controllintheir orbital movement, and also to allow. e pressure behind the ends ofthe flanges to travel through the rotor and become equalized.

The outermost edges of the slots 16 in the flanges l5 coincide with thebottom inner piston blades 9 move outwardly until they reach the outeredges 16 of the slots 8 in the flanges .15 and in which position theyare held and carried on the flanges past the bottom inner cylindricalsurface of the chamber 3, suficient allowance being provided to preventthe blades from havin frictional pgntact on said bottom surface 0 saidcham- A very important feature of the invention is the construction ofthe parts so as to reduce as much slippage as possible, and alsodecrease cavitation in the pump. By the present construction, thesuction side of the rotor is formed by one or rear face of each pistonblade and by the contiguous faces a of the side-flanges of the rotor,and by the blades car on the guides 8 in the flanges,

eat ac and as the flanges rotate with the blades, there is no endclearance space as to the suction, and thus, a chamber is formed thatrotates with the rotor.

It is the object to form the chambers so that one chamber or more isintaking and another or more discharging while a chamber is filled toits maximum capacity between the suction and the discharge, making aseries of continuous rotating chambers that relieves the pump of extremecavitation when it pumps against high pressures, and as there is no endclearance space as to the suction chamber the slippage of fluid throughthe pump is reduced.

Means are provided for determining the orbital movement and position ofthe several piston blades 9 and a preferred form of such meansconsistsof a pair of runners in the form of rings 10, of which there is onecountersunk in each end cover 18 of shell 2, the rings being disposedeccentric with respect to the rotor suflicient to allow the blades topass the top inner cylindrical surface of the shell 2. Suitableconnection is provided between the parallel rings l010 and the severalpiston blades 9, as shown in Figure 1, the'ends of the piston bladesextending through the flanges of the rotor and enter into a given set ofoblong holes 11 in rings 1010.

The rings in this case are driven by the several piston blades 9, theholes being of a length sufficient to allow the blades to pass the twocenters. Suflicient allowance is also provided in the width'of the holes11 to permit the blades to be carried on the flanges of the rotor asthey ass the lower inner cylindrical surface 0 chamber 3. After theblades have assed the lower inner cylindrical surface ofchamberB, theyare carried by the rings 10 past the top inner cylindrical surface ofshell 2.

I claim 1. A machine operative as a pump, having a shell, an eccentricrotor therein, orbitally controlled blades slidably mounted in therotor, and means provided in the rotor to prevent the piston blades fromhaving frictional contact on the inner cylindrical surface of the casingbetween the suction and discharge where the liquid travels'through thepump.

2. A machine, operative as a pump, having a shell, an eccentric rotortherein, radial piston blades mounted in the rotor, and means providedon the rotor to prevent the blades from havin contact on the inner cylindrical surface 0 the casing during their movement by the rotor.

3. A machine, operative as a pump, having a casing, an eccentric flangedrotor therein, piston lades mounted in the rotor and means to preventthe blades from havin frictional contact on the inner cylindrica surfaceof the casing between the suction and the discharge where. the liquidtravels throu h the pump.

4. machine, operativeas a pump, having a casin an eccentric rotortherein, orbitally control ed blades slidably mounted in the rotor andmeans provided on the rotor to guide and su port the orbitallycontrolled blades beyon the body of the rotor and carry the blades fromthe suction to the dis charge.

5. A rotor for a rotary ump, having means on the rotor to prevent t eblades from having frictional contact on the inner cylindrical wall ofthe casing where the liquid passes through the pump.

6. A rotor for a rotary pump, having means beyond the body of the rotorfor slidably supportin the blades, and carrying the blades from tesuction to the discharge.

7 A flange for a rotor of a rotating pump, provided with means toprevent the lades from having frictional contact on the innercylindrical surface of the casing where the-liquid passes through thepump.

0 GEORGE F. BALLAY.

